Merge branch 'master' of git://git.denx.de/u-boot-sh
[platform/kernel/u-boot.git] / drivers / sysreset / sysreset_sandbox.c
1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3  * Copyright (c) 2015 Google, Inc
4  * Written by Simon Glass <sjg@chromium.org>
5  */
6
7 #include <common.h>
8 #include <dm.h>
9 #include <errno.h>
10 #include <sysreset.h>
11 #include <asm/state.h>
12 #include <asm/test.h>
13
14 static int sandbox_warm_sysreset_request(struct udevice *dev,
15                                          enum sysreset_t type)
16 {
17         struct sandbox_state *state = state_get_current();
18
19         switch (type) {
20         case SYSRESET_WARM:
21                 state->last_sysreset = type;
22                 break;
23         default:
24                 return -ENOSYS;
25         }
26         if (!state->sysreset_allowed[type])
27                 return -EACCES;
28
29         return -EINPROGRESS;
30 }
31
32 int sandbox_warm_sysreset_get_status(struct udevice *dev, char *buf, int size)
33 {
34         strlcpy(buf, "Reset Status: WARM", size);
35
36         return 0;
37 }
38
39 static int sandbox_sysreset_request(struct udevice *dev, enum sysreset_t type)
40 {
41         struct sandbox_state *state = state_get_current();
42
43         /*
44          * If we have a device tree, the device we created from platform data
45          * (see the U_BOOT_DEVICE() declaration below) should not do anything.
46          * If we are that device, return an error.
47          */
48         if (state->fdt_fname && !dev_of_valid(dev))
49                 return -ENODEV;
50
51         switch (type) {
52         case SYSRESET_COLD:
53                 state->last_sysreset = type;
54                 break;
55         case SYSRESET_POWER:
56                 state->last_sysreset = type;
57                 if (!state->sysreset_allowed[type])
58                         return -EACCES;
59                 sandbox_exit();
60                 break;
61         default:
62                 return -ENOSYS;
63         }
64         if (!state->sysreset_allowed[type])
65                 return -EACCES;
66
67         return -EINPROGRESS;
68 }
69
70 int sandbox_sysreset_get_status(struct udevice *dev, char *buf, int size)
71 {
72         strlcpy(buf, "Reset Status: COLD", size);
73
74         return 0;
75 }
76
77 static struct sysreset_ops sandbox_sysreset_ops = {
78         .request        = sandbox_sysreset_request,
79         .get_status     = sandbox_sysreset_get_status,
80 };
81
82 static const struct udevice_id sandbox_sysreset_ids[] = {
83         { .compatible = "sandbox,reset" },
84         { }
85 };
86
87 U_BOOT_DRIVER(sysreset_sandbox) = {
88         .name           = "sysreset_sandbox",
89         .id             = UCLASS_SYSRESET,
90         .of_match       = sandbox_sysreset_ids,
91         .ops            = &sandbox_sysreset_ops,
92 };
93
94 static struct sysreset_ops sandbox_warm_sysreset_ops = {
95         .request        = sandbox_warm_sysreset_request,
96         .get_status     = sandbox_warm_sysreset_get_status,
97 };
98
99 static const struct udevice_id sandbox_warm_sysreset_ids[] = {
100         { .compatible = "sandbox,warm-reset" },
101         { }
102 };
103
104 U_BOOT_DRIVER(warm_sysreset_sandbox) = {
105         .name           = "warm_sysreset_sandbox",
106         .id             = UCLASS_SYSRESET,
107         .of_match       = sandbox_warm_sysreset_ids,
108         .ops            = &sandbox_warm_sysreset_ops,
109 };
110
111 /* This is here in case we don't have a device tree */
112 U_BOOT_DEVICE(sysreset_sandbox_non_fdt) = {
113         .name = "sysreset_sandbox",
114 };